Air ejector



J. H. SMITHv July 1, 1924.

AIR EJECTOR Filed Feb'. 1,

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July 1, 1924. 1,499,886

J. H. SMITH AIR EJECTOR Filed Feb. i, 1922 2 sheets-snee: a

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l NVENTOR ATTORNEY Patented .July l, 1924.

JOHN H. SMITH, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO WESTIlNG-HSE ELECTRIC @a MANFCTRING COMPANY, A CORPORATON OF PENNSYLVANIA.'

Vare EJnoToia.

Application led Februaryl, 1922. Serial No. 533,288.

T all whom t may concern.' y Be 1t known that I, JOHN li. SMITH, a citizen of the United States, and a resident of Philadelphia, in thel county ot Philadel! phia and State of Pennsylvania, -have invented a new and useful improvement in Air Ejectors, oi"l which the. following is a specification.

My invention relates to ejection appara tus and more particularly to air ejection apparatus of the multistage, intercooler type, such as is used in power plant installations in connection with steam condensers, and it has for an object to provide apparatus of the character designa-ted which shall be composed of standard units oi different sizes, assembled to form a 'complete ejector organization of any desired capacity.

-.notlher object of my invention is to provide an ejector organization assembled from units or ele-ments haring the same outside dimensions but of dille-rent ratings or capacities, which are interchangeable and which may be readily assembled, and in which certain portions of each unit may be isolated during operation for inspection or repair. These and other objects of my invention will appear more fully in the annexed specilicat-ion, 'having reference to the accompanying drawing in which F 1 is a longitudinal. section through one element of an ejector organization constructed in accordance with my invention; Fig. 2 is a similar sectiona view through a modilied form of my device; Fig. f5 is a transverse section through a two-moment organization, taken on the line llllief Fig. 1; Fig. 4 is a view similar to Fig. 1, illustrating the application of the jet, type of intercooler, and Fig. is a view partially in ele vat-ion, and partially in section on the line -V-V of Fig. 4. My invention contemplates the provision of an air ejector organization assembled from unit elements, each element consisting generally of a lirst stage ejector 10, a second sta-ge ejector 20, and an intercooler 15 located between the ej ectors 10 and 20. The

ejector *10,y whichis of the well known steam jet type, consists of a nozzle 11 and acombining tube 12,v and is adapted ton exhaust air and other gases from a. manifold 13 connected by a valve 14 to a condenser or other; apparatus served. Similarly, the ejector"'55 2O consists of a nozzle 21 and a icombining tube 22 and is adapted t@ exhaust air and non-condensible vapors from the intercooler 15 in a manner wellunderstood inL the art to which my invention relates. The"'60 combining tube 12 is connected by al conduit 17 to an inlet 18 of the intercooler 15. by means of which the, exhaust .from the ejector 10 plus the motive steam from the. nozzle 11 is introduced into `the intercoolerfo The intercooler 15 consists of ashell '19.,provided on its upper side with the inlet 18 and on its lower side with an outlet 23 and a drain, 24, and is provided with tubes' 26 'through which cooling water is circulated 70 to effect the condensation ot steam and vapor in the shell 19. The condensate is removed through the drain 24, in any well known manner, to any desired point, as sisted by battles which tend toprevent the efflux of condensa-te through the outlet 23. ,t-iir and other non-condensable fluid are withdrawn from the intercooler through the outlet 23 by the ejector 20, which exhausts to a discharge manifold 27, in a manner readily understood. The manifold 27 may be provided with a non-return ya-lve 28 if desired. l f

The intercooler shells are constructed in two or more` sizes,correspondingl .tov tshe capacities of the ejectors; an assembly of two sizes being shown in Fig. 3.' The sections are similar in construction7 having the sanne diameter `and being providedat eachl .end with the standard flanges 38; the-distinc- 90 tion as to size being secured by difference in length. The outside ends of each of the two outside ysections of` they intercooler assembly carry a tube sheet 35, thev diameters of which-correspond to the diameter of .the shells, and which are adapted` to be clamped against the standard lianges 88. The tube sheets 35 are adaptedto carry the tubes'. 26

which extend throughout the length of the assembled intercooler and by means of which cooling water is circulated.

One end of the assembly is provided with a cap member 33 having flanges adapted to be bolted or otherwise secured to the standard flanges 38 anid'to clamp the tube sheet 35 in position. The cap` member 33 together Vwith theV tube sheet 35 defines a reversing chamber 37 by means of which counter-flow of the cooling water is effected; The other end of the assembly is provided with a header member 41, having an integral partition 40, by means of which the tube sheet 35 at -that end is clamped in place, and which defines, with the tube sheet 35, a pair of chambers 42 to effect the feed of cooling water to the tubes 26. The header member 41 is provided with a cooling water inlet 43 and outlet 44 connected in a cooling` water circulating system in any well known manner (not shown).

By means of the standard flanges 38, the various sections of the apparatus are secured together in the usual manner by bolts (not shown). Each section is provided with the inlet 18 and the outlet 23, which inlets and outlets are of a uniform size and are provided with standard pipe flanges.

As members constituting an element of my ejector organization are constructed of a uniform size and are provided with standard flanges, any member from one element is freely interchangeable with a similar member from another element. In assembling` the complete elements of my organization to form ejection apparatus of any desired capacity, the elements are placed in position and the flanges 38 of the intercoolers bolted or otherwise secured together in abutting relation. The tube sheets 35 and 39 are next installed, carrying between them tu'b'es 26 of a proper length to extend through the sev eral intercoolers of the assembled apparatus in series. The header members 36 and 41, and the cap member 33 are then placed in position and the various steam or water connections made on each element, when the device is ready for use.

It will be apparent that by carrying .in stock a comparatively few elements having' ejectors of different capacities, the manufac turer is enabled to quickly and cheaply erect a complete ejection organization having any desired commercial capacity. The flexibility of service made possible by my invention thus presents an enormous advantage over the systems now in vogue among manufacturers, which necessitates either the building of individual apparatus to order for each installation, or the carrying in stock of a great variety of ejectors of different styles, designs and capacities.

The adaptability of my unit construction .intercooler elements of the j-et type.

may be illustrated in the following example, using two sizes of units, A and Il, having capacities represented by the arbitrarily selected values 1 and 3:

By these means of selection or combina tion., an organization may be assembled upon receipt of the order by the manufacturer, to any desired capacity within the range of commercial demand.

In Fig. 2 I have illustrated a modification of my invention in which I provide for the temporary isolation of either stage of the apparatus together with the intercooler. by-pass 46 having a suitable valve 47, connects the manifold 13 with the inlet of the ejector 20, and the valves 48 and 49 are located just before the ejector 10 and beyond the intercooler 28, respectively. By closing the valves 48 and 49 and opening the valve 47, the first stage ejector`10 and the intercooler 15 may be isolated for inspection or repair, the apparatus then operating on the second stage ejector 2O through the bypass 46.

A similar by-pass 51, having a valve 52,

connects the exhaust end of the combining tube 12 with the discharging manifold 27. A valve 53 is located between the combining tube 12 and the intercooler inlet 18, and a valve 54 is located between the combining tube 22 and the discharge manifold 27. By closing valves 47, 53 and 54 and opening valves 48 and`52, the intercooler 15 and the second stage ejector 20 may be isolated for inspection or repair, the apparatus then operating on the first stage ejector 10 through the by-pass 51. By closing the valves 49 and 53, and opening` all others, the intercooler 15 may be isolated, the ejectors l0 and 2O then operating in parallel. During normal operation of the apparatus, the valves 47 and 52 are closed, and all the other valves open.

In 'Figs 4 and 5 I have illustrated a modification of my invention in which I provide The fluid exhausted from the primary ejector 10 passes through the conduit 17 tothe inlet 18 of the intercooler 15, where it is subjected to the condensing action of water from the nozzles 59, mounted in the nozzle boxes 58.

'The nozzle boxes 53 are supplied with cool-- susceptible of various other changes and modifications without departing from thev spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically yset forthin the appended claims.

What .I claimis: .1. In a multistage air ejector organization, in combination, a plurality of elements,

each element comprising a first stage ejector, a second stage ejector and an intercooler .between said first and second stage ejectors,

means connecting :the elements to form the assembled ejector organization and means supplying cooling fluid to said intercoolers.

2. In a multistage air ejector organization, in lcombination, a plurality of elements, each element comprising a first stage ejector, a second stage ejector and an intercooler, flanged connections associating the `elements to formjthe assembled ejector organization, and means common to all of said elements for supplying cooling fluid. to said inter-coolers. j

3. In a multistage air ejector organization, in combination, a plurality of elements y Iof different capacities, each element comprising a first stage ejector, a second stage vejector and an intercooler between said first andl second stager ejectors, means connecting theV elements to .form the assembled ejector organization, and `means common to all of said elements for supplyingcooling fluid to said .intercoolers 4, In a multistage air ejector organization,in,comb ination, aplurality of elements of different sizes, each element comprising a first stage e'ector, a `second stage ejector and an intercooler, flanged connections associating the elements to form the assembled ejector organization, and means common to all of said elements for supplying cooling A fluid to said intercoolers,

5. In a multistage air ejector organization, in combination, a plurality of elements of different sizes, each element comprising a first stage ejector, a second stage ejector and an intercooler, and means connecting the elements to form the assembled ejector organization, said means comprising standard flanges of uniform size whereby elements of different sizes may be assembled to form ejector organizations of different capacities.

6. In .il multistage air ejector organiz(- tion, in combination, a plurality of elements of dierent capacities, each element coinprising av first stage ejector, a second stage ejector and an intercooler, means connecte ing the elements to form the assembled ejector organization, said means comprising standard flanges of uniform size whereby elements of different sizes may be assembled ton form ejector organizations of different: capacit-ies, and means common to ali of said elements for `supplying cooling ii'uid to .said intercoolers, said last named means includ- .ing hfeadersections for effecting reversal of the cooling Huid.

tion, in combination, a plurality of elements having the same outside dimensions, each element, comprising a first stage ejector, a

`second' stage ejector and an intercoolenn.

the ejectors in each element having different capacities; andl means connecting the elements to form the assembled ejector organization.

8. In a multistage air ejector organiza-@ tion, in combination, a plurality of elements, having the same outside dimensions, each element including means connecting the elements to form the assembled ejector organiizatiol, said means comprising standard flanges Aof uniform size whereby elements of different sizes may be assembled to form ejector organizations of different capacities, each element comprising aiirst stage ejector, a `second stage ejector and an intercooler, the ejectors in'each element having different capacities; whereby an air ejector organization of any desired capacity may be built up of standard units.V

9. .In a lmultistage air ejector organization,lin combination, a plurality of elements, eachelement comprising a first stage ejector, a second stage ejector and an intercooler, an inlet manifold connecting the first stage ejectors, a discharge manifold connecting the second stageejectors, and a by-pass for each element from a point between they inlet manifoldAv and the first stage ejector to a point between the intercoolerand the second stage ejector. Y

i In a multistage air ejector organization, in combination, a plurality of elements, each element comprising a. first stage-ejector, a second stage ejector and an intercooler, an inletl manifold connecting the first stage ejectors, a discharge manifold connecting the second stage ejectors and a by-pass for each element from a point between the first stage ejector and the intercooler to a point between the intercoolerand the discharge manifold.

ll. In a multistage air ejector organization, in combination, a plurality of elements, each element comprising a first stage ejector, a second stage ejector and an intercooler,

v,so 7. In a multistage air ejector organiza-'l and means for isolatingeither ejector and the intercooler of each-element;

12. lin a multistage air ejector organization, in combination, a plurality of elements, each element comprising a first stage ejector, a second stage ejector andan intercooler, means for isolating the iirst stage ejector and the intercooler of each element, and means for isolating the intercooler and the second stage ejector ofreach element, said means comprising valved by-passes. j

13. in a multistage air ejector .organization, in combination, a plurality of elements, each element comprising a .first stage ejector. a second stage ejector and an interceoler, and means comprising valved bypasses for isolating either ejector and the intercooler of each element, said by-passes having standard Hanges of uniform size whereby they may be interchangeably iitted to elements of different sizes.

14 in a multistage air ejector organization, in combination, a plurality of elements of different sizes, each element comprising a first stage ejector, a second stage yejector and an intercooler between said first and second sta-ge ejectors, means common to all of said elements for supplying cooling fluid to said intercoolers, header sections for effecting reversal of the cooling fluid, and means for isolating the first stage ejector and the intercooler of each element.

15, In a multistage air ejector organization, in combination, a plurality of elements of different sizes, each element comprising a rst stage ejector, a second stage ejector and an intercooler between said rst and second stage ejectors, means common to all of said elements for supplying cooling Water to said intercoolers, header sections for eecting reversal of the cooling fluid, and means for isolating the intercooler and the second stage ejector of each element..

16. ln a multistage air ejector organization, in combination, a plurality of elements of different sizes, each element comprising a 'first stage ejector, a second stage ejector and an intercooler, means for isolating either ejector and the intercooler of each element, means for interchangeably connecting the elements, and means for interchangeably connecting the isolating means to any` of the elementst incassa 17. lin a multistage 4air ejector organization, in combinatioma phirality of elements of differentsizes, having the same outside dimensions, each element comprising a first stage ejector, a second stage ejector and an intercooler between said first and second stage ejectors, an inlet manifold Vconnecting the first stage ejectors, a disch'arge'manifold connecting the second .stage ejectors, means common to all of said elements for supply ing cooling Huid to said ,intercoolers, header sections for effecting reversal of the cooling fluid, means for isolating either ejector and the intercooler of each element, including ralved ley-passes, means for interchangeably connecting the isolating means to any of the elements, and means for interchangeably connecting the elements', comprising standard flanges of uniform size whereby elements of different sizesmay be assembled to forni ejector organization of different capacities 18= in an ejector mechanism, in combination, a plurality 4of inultipl'efstage ,ejector units, each unit comprising a'plurality of stage ejectors connected in series and an intercooler interposed inthe connection between the successive stage ejectors, and means for connecting the ejector units to form an assembled ejector mechanism..

19` In an ejector mechanism, in combination, a plurality of multiple stage ejector units of diiierent capacities, each unit coin-- prising a plurality of stage ejectors connected in series and an intercooler interposed n the connection between the succes-- sive stage ejectors, and means 'for connecting the ejector units to form an assembled ejector mechanismi f 20, 1n an ejector mechanism, in combination, a plurality of multiple stage ejector units of different capacities,each'unit comprising a plurality of stage ejectors connected in series and an intercooler interposed in the connection between they successive Vstage ejectors, and means for interchangeably connecting the units to form an assembled ejector mechanism.

In testimony whereof, hare hereunto subscribed my name this 27th day of January, 1922.

y Jenn n, sMiri-i, 

